Iterating through items in a tree control using the getTestData method

This topic provides an example of using HCL OneTest™ UI's getTestData method to programmatically access the values on the branches of a tree control.

The following example tests against the Classics Java™ application:

import resources.GetTreeDataExampleHelper;
import com.rational.test.ft.*;
import com.rational.test.ft.object.interfaces.*;
import com.rational.test.ft.object.interfaces.SAP.*;
import com.rational.test.ft.object.interfaces.siebel.*;
import com.rational.test.ft.script.*;
import com.rational.test.ft.value.*;
import com.rational.test.ft.vp.*;

 * Description   : Functional Test Script
 * @author Administrator
public class GetTreeDataExample extends GetTreeDataExampleHelper
	 * Script Name   : GetTreeDataExample
	 * Generated     : Jul 14, 2006 4:46:31 PM
	 * Description   : Functional Test Script
	 * Original Host : WinNT Version 5.1  Build 2600 (S)
	 * @since  2006/07/14
	 * @author Administrator
	public void testMain(Object[] args) 
		//Start Classics Java Application
		// Frame: ClassicsCD
		//Display available test data types available from tree
		System.out.println ("Available Tree Data Types: " + tree2().getTestDataTypes());
		//Declare variables for tree
		ITestDataTree cdTree;
		ITestDataTreeNodes cdTreeNodes;
		ITestDataTreeNode[] cdTreeNode;

		//Variables to hold tree data
		cdTree = (ITestDataTree)tree2().getTestData("tree");
		cdTreeNodes = cdTree.getTreeNodes();
		cdTreeNode = cdTreeNodes.getRootNodes();

		//Print out total number of nodes
		System.out.println ("Tree Total Node Count: " + cdTreeNodes.getNodeCount());
		System.out.println ("Tree Root Node Count : " + cdTreeNodes.getRootNodeCount());

		//Iterate through tree branches; this is a recursive method.
		for (int i = 0;i<cdTreeNode.length;++i)
		showTree(cdTreeNode[i], 0);

		//Shut down Classics Java Application

		void showTree(ITestDataTreeNode node, int indent)
		//Recursive method to print out tree nodes with proper indenting.

		//Determine number of tabs to use - to properly indent tree
		int tabCount = ( indent < tabs.length() ? indent :
		tabs.length() );

		//Print out node name + number of children
		System.out.println(tabs.substring(0, tabCount) + node.getNode() + " (" + node.getChildCount() + "children)" );

		//Determine if node has children; recursively call this same
		//method to print out child nodes.
		ITestDataTreeNode[] children = node.getChildren();
		int childCount = ( children != null ? children.length : 0 );
		for ( int i = 0; i < childCount; ++i )
		showTree(children[i], indent+1);

		//String of tabs used to indent tree view
		final String tabs = "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";


On the first screen of this application is a Java Swing JTree component, which lists five composers. The next level down lists CDs available for the selected composer. The code in this sample extracts the values from all of the branches of the tree and displays them in the console window.

The first step to extracting the data is to use the getTestData method to extract the data from the control. This is done with the following syntax:

ITestDataTree cdTree;  
cdTree = (ITestDataTree)tree2().getTestData("tree");

The next step is to create an array that contains all of the nodes on the tree. This is done as follows:

ITestDataTreeNodes cdTreeNodes;
ITestDataTreeNode[] cdTreeNode;

cdTreeNodes = cdTree.getTreeNodes();//Encapsulates the root
cdTreeNode = cdTreeNodes.getRootNodes();;//Extracts actual
root nodes.

Note that this is a two-step process. First, you must use the getTreeNodes method to return a TreeNodes object. Then you can call the getRootNodes method to extract an array of the root nodes for the tree.

With the tree nodes in hand, you can use recursion to walk though each node to determine its value and the number of direct children it contains. This is done in the recursive method showTree. A recursive method is a method that calls itself, and is an efficient way to walk through a tree structure. To extract the value of the node, the getNode method is used. To extract the number of children contained by the node, the getChildCount method is used. In the example, this is done with the following code:

System.out.println(tabs.substring(0, tabCount) + node.getNode()+" (" + node.getChildCount() + " children)"); 

Note the additional coding provided in the custom showTree method is to enable a formatted printing using tabs to indicate the indentation of the tree.